eNB_scheduler_mch.c 28.6 KB
Newer Older
1
/*******************************************************************************
2 3
    OpenAirInterface
    Copyright(c) 1999 - 2014 Eurecom
4

5 6 7 8
    OpenAirInterface is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
9 10


11 12 13 14
    OpenAirInterface is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.
15

16 17 18 19
    You should have received a copy of the GNU General Public License
    along with OpenAirInterface.The full GNU General Public License is
    included in this distribution in the file called "COPYING". If not,
    see <http://www.gnu.org/licenses/>.
20 21

  Contact Information
22 23 24 25
  OpenAirInterface Admin: openair_admin@eurecom.fr
  OpenAirInterface Tech : openair_tech@eurecom.fr
  OpenAirInterface Dev  : openair4g-devel@eurecom.fr

ghaddab's avatar
ghaddab committed
26
  Address      : Eurecom, Campus SophiaTech, 450 Route des Chappes, CS 50193 - 06904 Biot Sophia Antipolis cedex, FRANCE
27 28

*******************************************************************************/
29 30

/*! \file eNB_scheduler_mch.c
31
 * \brief procedures related to eNB for the MCH transport channel
32 33 34
 * \author  Navid Nikaein and Raymond Knopp
 * \date 2012 - 2014
 * \email: navid.nikaein@eurecom.fr
35
 * \version 1.0
36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65
 * @ingroup _mac

 */

#include "assertions.h"
#include "PHY/defs.h"
#include "PHY/extern.h"

#include "SCHED/defs.h"
#include "SCHED/extern.h"

#include "LAYER2/MAC/defs.h"
#include "LAYER2/MAC/proto.h"
#include "LAYER2/MAC/extern.h"
#include "UTIL/LOG/log.h"
#include "UTIL/LOG/vcd_signal_dumper.h"
#include "UTIL/OPT/opt.h"
#include "OCG.h"
#include "OCG_extern.h"

#include "RRC/LITE/extern.h"
#include "RRC/L2_INTERFACE/openair_rrc_L2_interface.h"

//#include "LAYER2/MAC/pre_processor.c"
#include "pdcp.h"

#if defined(ENABLE_ITTI)
# include "intertask_interface.h"
#endif

66 67
#include "SIMULATION/TOOLS/defs.h" // for taus

68 69 70 71 72
#define ENABLE_MAC_PAYLOAD_DEBUG
#define DEBUG_eNB_SCHEDULER 1


#ifdef Rel10
73 74
int8_t get_mbsfn_sf_alloction (module_id_t module_idP, uint8_t CC_id, uint8_t mbsfn_sync_area)
{
75
  // currently there is one-to-one mapping between sf allocation pattern and sync area
76 77 78
  if (mbsfn_sync_area > MAX_MBSFN_AREA) {
    LOG_W(MAC,"[eNB %d] MBSFN synchronization area %d out of range\n ", module_idP, mbsfn_sync_area);
    return -1;
79
  } else if (eNB_mac_inst[module_idP].common_channels[CC_id].mbsfn_SubframeConfig[mbsfn_sync_area] != NULL) {
80
    return mbsfn_sync_area;
81
  } else {
82 83
    LOG_W(MAC,"[eNB %d] MBSFN Subframe Config pattern %d not found \n ", module_idP, mbsfn_sync_area);
    return -1;
84 85 86
  }
}

87 88
int schedule_MBMS(module_id_t module_idP, uint8_t CC_id, frame_t frameP, sub_frame_t subframeP)
{
89 90 91 92

  int mcch_flag=0,mtch_flag=0, msi_flag=0;
  int mbsfn_period =0;// 1<<(eNB_mac_inst[module_idP].mbsfn_SubframeConfig[0]->radioframeAllocationPeriod);
  int mcch_period = 0;//32<<(eNB_mac_inst[module_idP].mbsfn_AreaInfo[0]->mcch_Config_r9.mcch_RepetitionPeriod_r9);
93
  int mch_scheduling_period = 8<<(eNB_mac_inst[module_idP].common_channels[CC_id].pmch_Config[0]->mch_SchedulingPeriod_r9);
94 95 96 97 98 99 100 101 102 103 104 105
  unsigned char mcch_sdu_length;
  unsigned char header_len_mcch=0,header_len_msi=0,header_len_mtch=0, header_len_mtch_temp=0, header_len_mcch_temp=0, header_len_msi_temp=0;
  int ii=0, msi_pos=0;
  int mcch_mcs = -1;
  uint16_t TBS,j,padding=0,post_padding=0;
  mac_rlc_status_resp_t rlc_status;
  int num_mtch;
  int msi_length,i,k;
  unsigned char sdu_lcids[11], num_sdus=0, offset=0;
  uint16_t sdu_lengths[11], sdu_length_total=0;
  unsigned char mch_buffer[MAX_DLSCH_PAYLOAD_BYTES]; // check the max value, this is for dlsch only

106
  eNB_mac_inst[module_idP].common_channels[CC_id].MCH_pdu.Pdu_size=0;
107 108

  for (i=0;
109 110 111
       i< eNB_mac_inst[module_idP].common_channels[CC_id].num_active_mbsfn_area;
       i++ ) {
    // assume, that there is always a mapping
112
    if ((j=get_mbsfn_sf_alloction(module_idP,CC_id,i)) == -1) {
113
      return 0;
114
    }
115

116 117 118 119 120
    mbsfn_period = 1<<(eNB_mac_inst[module_idP].common_channels[CC_id].mbsfn_SubframeConfig[j]->radioframeAllocationPeriod);
    mcch_period = 32<<(eNB_mac_inst[module_idP].common_channels[CC_id].mbsfn_AreaInfo[i]->mcch_Config_r9.mcch_RepetitionPeriod_r9);
    msi_pos=0;
    ii=0;
    LOG_D(MAC,"[eNB %d] Frame %d subframeP %d : Checking MBSFN Sync Area %d/%d with SF allocation %d/%d for MCCH and MTCH (mbsfn period %d, mcch period %d)\n",
121 122
          module_idP,frameP, subframeP,i,eNB_mac_inst[module_idP].common_channels[CC_id].num_active_mbsfn_area,
          j,eNB_mac_inst[module_idP].common_channels[CC_id].num_sf_allocation_pattern,mbsfn_period,mcch_period);
123 124


125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162
    switch (eNB_mac_inst[module_idP].common_channels[CC_id].mbsfn_AreaInfo[i]->mcch_Config_r9.signallingMCS_r9) {
    case 0:
      mcch_mcs = 2;
      break;

    case 1:
      mcch_mcs = 7;
      break;

    case 2:
      mcch_mcs = 13;
      break;

    case 3:
      mcch_mcs = 19;
      break;
    }

    // 1st: Check the MBSFN subframes from SIB2 info (SF allocation pattern i, max 8 non-overlapping patterns exist)
    if (frameP %  mbsfn_period == eNB_mac_inst[module_idP].common_channels[CC_id].mbsfn_SubframeConfig[j]->radioframeAllocationOffset) { // MBSFN frameP
      if (eNB_mac_inst[module_idP].common_channels[CC_id].mbsfn_SubframeConfig[j]->subframeAllocation.present == MBSFN_SubframeConfig__subframeAllocation_PR_oneFrame) { // one-frameP format

        //  Find the first subframeP in this MCH to transmit MSI
        if (frameP % mch_scheduling_period == eNB_mac_inst[module_idP].common_channels[CC_id].mbsfn_SubframeConfig[j]->radioframeAllocationOffset ) {
          while (ii == 0) {
            ii = eNB_mac_inst[module_idP].common_channels[CC_id].mbsfn_SubframeConfig[j]->subframeAllocation.choice.oneFrame.buf[0] & (0x80>>msi_pos);
            msi_pos++;
          }

          LOG_D(MAC,"[eNB %d] Frame %d subframeP %d : sync area %d sf allocation pattern %d sf alloc %x msi pos is %d \n", module_idP,frameP, subframeP,i,j,
                eNB_mac_inst[module_idP].common_channels[CC_id].mbsfn_SubframeConfig[j]->subframeAllocation.choice.oneFrame.buf[0], msi_pos);
        }

        // Check if the subframeP is for MSI, MCCH or MTCHs and Set the correspoding flag to 1
        switch (subframeP) {
        case 1:
          if (mac_xface->lte_frame_parms->frame_type == FDD) {
            if ((eNB_mac_inst[module_idP].common_channels[CC_id].mbsfn_SubframeConfig[j]->subframeAllocation.choice.oneFrame.buf[0] & MBSFN_FDD_SF1) == MBSFN_FDD_SF1) {
163
              if (msi_pos == 1) {
164
                msi_flag = 1;
165
              }
166 167

              if ( (frameP % mcch_period == eNB_mac_inst[module_idP].common_channels[CC_id].mbsfn_AreaInfo[i]->mcch_Config_r9.mcch_Offset_r9) &&
168
                   ((eNB_mac_inst[module_idP].common_channels[CC_id].mbsfn_AreaInfo[i]->mcch_Config_r9.sf_AllocInfo_r9.buf[0] & MBSFN_FDD_SF1) == MBSFN_FDD_SF1) ) {
169
                mcch_flag = 1;
170
              }
171 172 173 174 175 176 177 178 179 180

              mtch_flag = 1;
            }
          }

          break;

        case 2:
          if (mac_xface->lte_frame_parms->frame_type == FDD) {
            if ((eNB_mac_inst[module_idP].common_channels[CC_id].mbsfn_SubframeConfig[j]->subframeAllocation.choice.oneFrame.buf[0] & MBSFN_FDD_SF2) == MBSFN_FDD_SF2) {
181
              if (msi_pos == 2) {
182
                msi_flag = 1;
183
              }
184 185

              if ( (frameP % mcch_period == eNB_mac_inst[module_idP].common_channels[CC_id].mbsfn_AreaInfo[i]->mcch_Config_r9.mcch_Offset_r9) &&
186
                   ((eNB_mac_inst[module_idP].common_channels[CC_id].mbsfn_AreaInfo[i]->mcch_Config_r9.sf_AllocInfo_r9.buf[0] & MBSFN_FDD_SF2) == MBSFN_FDD_SF2) ) {
187
                mcch_flag = 1;
188
              }
189

190 191
              mtch_flag = 1;
            }
192
          }
193 194 195 196 197 198

          break;

        case 3:
          if (mac_xface->lte_frame_parms->frame_type == TDD) { // TDD
            if ((eNB_mac_inst[module_idP].common_channels[CC_id].mbsfn_SubframeConfig[j]->subframeAllocation.choice.oneFrame.buf[0] & MBSFN_TDD_SF3) == MBSFN_TDD_SF3) {
199
              if (msi_pos == 1) {
200
                msi_flag = 1;
201
              }
202 203

              if ( (frameP % mcch_period == eNB_mac_inst[module_idP].common_channels[CC_id].mbsfn_AreaInfo[i]->mcch_Config_r9.mcch_Offset_r9) &&
204
                   ((eNB_mac_inst[module_idP].common_channels[CC_id].mbsfn_AreaInfo[i]->mcch_Config_r9.sf_AllocInfo_r9.buf[0] & MBSFN_TDD_SF3) == MBSFN_TDD_SF3) ) {
205
                mcch_flag = 1;
206
              }
207 208 209 210 211

              mtch_flag = 1;
            }
          } else { // FDD
            if ((eNB_mac_inst[module_idP].common_channels[CC_id].mbsfn_SubframeConfig[j]->subframeAllocation.choice.oneFrame.buf[0] & MBSFN_FDD_SF3) == MBSFN_FDD_SF3) {
212
              if (msi_pos == 3) {
213
                msi_flag = 1;
214
              }
215 216

              if ( (frameP % mcch_period == eNB_mac_inst[module_idP].common_channels[CC_id].mbsfn_AreaInfo[i]->mcch_Config_r9.mcch_Offset_r9) &&
217
                   ((eNB_mac_inst[module_idP].common_channels[CC_id].mbsfn_AreaInfo[i]->mcch_Config_r9.sf_AllocInfo_r9.buf[0] & MBSFN_FDD_SF3) == MBSFN_FDD_SF3) ) {
218
                mcch_flag = 1;
219
              }
220 221 222 223 224 225 226 227 228 229

              mtch_flag = 1;
            }
          }

          break;

        case 4:
          if (mac_xface->lte_frame_parms->frame_type == TDD) {
            if ((eNB_mac_inst[module_idP].common_channels[CC_id].mbsfn_SubframeConfig[j]->subframeAllocation.choice.oneFrame.buf[0] & MBSFN_TDD_SF4) == MBSFN_TDD_SF4) {
230
              if (msi_pos == 2) {
231
                msi_flag = 1;
232
              }
233 234

              if ( (frameP % mcch_period == eNB_mac_inst[module_idP].common_channels[CC_id].mbsfn_AreaInfo[i]->mcch_Config_r9.mcch_Offset_r9) &&
235
                   ((eNB_mac_inst[module_idP].common_channels[CC_id].mbsfn_AreaInfo[i]->mcch_Config_r9.sf_AllocInfo_r9.buf[0] & MBSFN_TDD_SF4) == MBSFN_TDD_SF4) ) {
236
                mcch_flag = 1;
237
              }
238 239 240 241 242 243 244 245 246 247

              mtch_flag = 1;
            }
          }

          break;

        case 6:
          if (mac_xface->lte_frame_parms->frame_type == FDD) {
            if ((eNB_mac_inst[module_idP].common_channels[CC_id].mbsfn_SubframeConfig[j]->subframeAllocation.choice.oneFrame.buf[0] & MBSFN_FDD_SF6) == MBSFN_FDD_SF6) {
248
              if (msi_pos == 4) {
249
                msi_flag = 1;
250
              }
251 252

              if ( (frameP % mcch_period == eNB_mac_inst[module_idP].common_channels[CC_id].mbsfn_AreaInfo[i]->mcch_Config_r9.mcch_Offset_r9) &&
253
                   ((eNB_mac_inst[module_idP].common_channels[CC_id].mbsfn_AreaInfo[i]->mcch_Config_r9.sf_AllocInfo_r9.buf[0] & MBSFN_FDD_SF6) == MBSFN_FDD_SF6) ) {
254
                mcch_flag = 1;
255
              }
256 257 258 259 260 261 262 263 264 265

              mtch_flag = 1;
            }
          }

          break;

        case 7:
          if (mac_xface->lte_frame_parms->frame_type == TDD) { // TDD
            if ((eNB_mac_inst[module_idP].common_channels[CC_id].mbsfn_SubframeConfig[j]->subframeAllocation.choice.oneFrame.buf[0] & MBSFN_TDD_SF7) == MBSFN_TDD_SF7) {
266
              if (msi_pos == 3) {
267
                msi_flag = 1;
268
              }
269 270

              if ( (frameP % mcch_period == eNB_mac_inst[module_idP].common_channels[CC_id].mbsfn_AreaInfo[i]->mcch_Config_r9.mcch_Offset_r9) &&
271
                   ((eNB_mac_inst[module_idP].common_channels[CC_id].mbsfn_AreaInfo[i]->mcch_Config_r9.sf_AllocInfo_r9.buf[0] & MBSFN_TDD_SF7) == MBSFN_TDD_SF7) ) {
272
                mcch_flag = 1;
273
              }
274 275 276 277 278

              mtch_flag = 1;
            }
          } else { // FDD
            if ((eNB_mac_inst[module_idP].common_channels[CC_id].mbsfn_SubframeConfig[j]->subframeAllocation.choice.oneFrame.buf[0] & MBSFN_FDD_SF7) == MBSFN_FDD_SF7) {
279
              if (msi_pos == 5) {
280
                msi_flag = 1;
281
              }
282 283

              if ( (frameP % mcch_period == eNB_mac_inst[module_idP].common_channels[CC_id].mbsfn_AreaInfo[i]->mcch_Config_r9.mcch_Offset_r9) &&
284
                   ((eNB_mac_inst[module_idP].common_channels[CC_id].mbsfn_AreaInfo[i]->mcch_Config_r9.sf_AllocInfo_r9.buf[0] & MBSFN_FDD_SF7) == MBSFN_FDD_SF7) ) {
285
                mcch_flag = 1;
286
              }
287 288 289 290 291 292 293 294 295 296

              mtch_flag = 1;
            }
          }

          break;

        case 8:
          if (mac_xface->lte_frame_parms->frame_type == TDD) { //TDD
            if ((eNB_mac_inst[module_idP].common_channels[CC_id].mbsfn_SubframeConfig[j]->subframeAllocation.choice.oneFrame.buf[0] & MBSFN_TDD_SF8) == MBSFN_TDD_SF8) {
297
              if (msi_pos == 4) {
298
                msi_flag = 1;
299
              }
300 301

              if ( (frameP % mcch_period == eNB_mac_inst[module_idP].common_channels[CC_id].mbsfn_AreaInfo[i]->mcch_Config_r9.mcch_Offset_r9) &&
302
                   ((eNB_mac_inst[module_idP].common_channels[CC_id].mbsfn_AreaInfo[i]->mcch_Config_r9.sf_AllocInfo_r9.buf[0] & MBSFN_TDD_SF8) == MBSFN_TDD_SF8) ) {
303
                mcch_flag = 1;
304
              }
305 306 307 308 309

              mtch_flag = 1;
            }
          } else { // FDD
            if ((eNB_mac_inst[module_idP].common_channels[CC_id].mbsfn_SubframeConfig[j]->subframeAllocation.choice.oneFrame.buf[0] & MBSFN_FDD_SF8) == MBSFN_FDD_SF8) {
310
              if (msi_pos == 6) {
311
                msi_flag = 1;
312
              }
313 314

              if ( (frameP % mcch_period == eNB_mac_inst[module_idP].common_channels[CC_id].mbsfn_AreaInfo[i]->mcch_Config_r9.mcch_Offset_r9) &&
315
                   ((eNB_mac_inst[module_idP].common_channels[CC_id].mbsfn_AreaInfo[i]->mcch_Config_r9.sf_AllocInfo_r9.buf[0] & MBSFN_FDD_SF8) == MBSFN_FDD_SF8) ) {
316
                mcch_flag = 1;
317
              }
318 319 320 321 322 323 324 325 326 327

              mtch_flag = 1;
            }
          }

          break;

        case 9:
          if (mac_xface->lte_frame_parms->frame_type == TDD) {
            if ((eNB_mac_inst[module_idP].common_channels[CC_id].mbsfn_SubframeConfig[j]->subframeAllocation.choice.oneFrame.buf[0] & MBSFN_TDD_SF9) == MBSFN_TDD_SF9) {
328
              if (msi_pos == 5) {
329
                msi_flag = 1;
330
              }
331 332

              if ( (frameP % mcch_period == eNB_mac_inst[module_idP].common_channels[CC_id].mbsfn_AreaInfo[i]->mcch_Config_r9.mcch_Offset_r9) &&
333
                   ((eNB_mac_inst[module_idP].common_channels[CC_id].mbsfn_AreaInfo[i]->mcch_Config_r9.sf_AllocInfo_r9.buf[0] & MBSFN_TDD_SF9) == MBSFN_TDD_SF9) ) {
334
                mcch_flag = 1;
335
              }
336 337 338

              mtch_flag = 1;
            }
339
          }
340 341 342 343 344 345 346 347 348 349 350

          break;
        }// end switch

        // sf allocation is non-overlapping
        if ((msi_flag==1) || (mcch_flag==1) || (mtch_flag==1)) {
          LOG_D(MAC,"[eNB %d] Frame %d Subframe %d: sync area %d SF alloc %d: msi flag %d, mcch flag %d, mtch flag %d\n",
                module_idP, frameP, subframeP,i,j,msi_flag,mcch_flag,mtch_flag);
          break;
        }
      } else { // four-frameP format
351
      }
352
    }
353
  } // end of for loop
354

355 356 357
  eNB_mac_inst[module_idP].common_channels[CC_id].msi_active=0;
  eNB_mac_inst[module_idP].common_channels[CC_id].mcch_active=0;
  eNB_mac_inst[module_idP].common_channels[CC_id].mtch_active=0;
358

359 360
  // Calculate the mcs
  if ((msi_flag==1) || (mcch_flag==1)) {
361 362 363
    eNB_mac_inst[module_idP].common_channels[CC_id].MCH_pdu.mcs = mcch_mcs;
  } else if (mtch_flag == 1) { // only MTCH in this subframeP
    eNB_mac_inst[module_idP].common_channels[CC_id].MCH_pdu.mcs = eNB_mac_inst[module_idP].common_channels[CC_id].pmch_Config[0]->dataMCS_r9;
364 365 366 367 368 369 370
  }


  // 2nd: Create MSI, get MCCH from RRC and MTCHs from RLC

  // there is MSI (MCH Scheduling Info)
  if (msi_flag == 1) {
371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398
    // Create MSI here
    uint16_t msi_control_element[29], *msi_ptr;

    msi_ptr = &msi_control_element[0];
    ((MSI_ELEMENT *) msi_ptr)->lcid = MCCH_LCHANID; //MCCH

    if (mcch_flag==1) {
      ((MSI_ELEMENT *) msi_ptr)->stop_sf_MSB = 0;
      ((MSI_ELEMENT *) msi_ptr)->stop_sf_LSB = 0;
    } else {                  // no mcch for this MSP
      ((MSI_ELEMENT *) msi_ptr)->stop_sf_MSB = 0x7;// stop value is 2047
      ((MSI_ELEMENT *) msi_ptr)->stop_sf_LSB = 0xff;
    }

    msi_ptr+= sizeof(MSI_ELEMENT);

    //Header for MTCHs
    num_mtch = eNB_mac_inst[module_idP].common_channels[CC_id].mbms_SessionList[0]->list.count;

    for (k=0; k<num_mtch; k++) { // loop for all session in this MCH (MCH[0]) at this moment
      ((MSI_ELEMENT *) msi_ptr)->lcid = eNB_mac_inst[module_idP].common_channels[CC_id].mbms_SessionList[0]->list.array[k]->logicalChannelIdentity_r9;//mtch_lcid;
      ((MSI_ELEMENT *) msi_ptr)->stop_sf_MSB = 0; // last subframeP of this mtch (only one mtch now)
      ((MSI_ELEMENT *) msi_ptr)->stop_sf_LSB = 0xB;
      msi_ptr+=sizeof(MSI_ELEMENT);
    }

    msi_length = msi_ptr-msi_control_element;

399
    if (msi_length<128) {
400
      header_len_msi = 2;
401
    } else {
402
      header_len_msi = 3;
403
    }
404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419

    LOG_D(MAC,"[eNB %d] Frame %d : MSI->MCH, length of MSI is %d bytes \n",module_idP,frameP,msi_length);
    //LOG_D(MAC,"Scheduler: MSI is transmitted in this subframeP \n" );

    //   LOG_D(MAC,"Scheduler: MSI length is %d bytes\n",msi_length);
    // Store MSI data to mch_buffer[0]
    memcpy((char *)&mch_buffer[sdu_length_total],
           msi_control_element,
           msi_length);

    sdu_lcids[num_sdus] = MCH_SCHDL_INFO;
    sdu_lengths[num_sdus] = msi_length;
    sdu_length_total += sdu_lengths[num_sdus];
    LOG_I(MAC,"[eNB %d] Create %d bytes for MSI\n",module_idP,sdu_lengths[num_sdus]);
    num_sdus++;
    eNB_mac_inst[module_idP].common_channels[CC_id].msi_active=1;
420 421 422 423
  }

  // there is MCCH
  if (mcch_flag == 1) {
424
    LOG_D(MAC,"[eNB %d] Frame %d Subframe %d: Schedule MCCH MESSAGE (area %d, sfAlloc %d)\n",
425 426
          module_idP,frameP, subframeP, i, j);

427
    mcch_sdu_length = mac_rrc_data_req(module_idP,
428
                                       CC_id,
429 430 431 432 433 434
                                       frameP,
                                       MCCH,1,
                                       &eNB_mac_inst[module_idP].common_channels[CC_id].MCCH_pdu.payload[0],
                                       1,// this is eNB
                                       module_idP, // index
                                       i); // this is the mbsfn sync area index
435

436 437
    if (mcch_sdu_length > 0) {
      LOG_D(MAC,"[eNB %d] Frame %d subframeP %d : MCCH->MCH, Received %d bytes from RRC \n",module_idP,frameP,subframeP,mcch_sdu_length);
438

439 440 441 442 443 444 445 446 447 448 449 450 451 452
      header_len_mcch = 2;

      if (mac_xface->lte_frame_parms->frame_type == TDD) {
        LOG_D(MAC,"[eNB %d] Frame %d subframeP %d: Scheduling MCCH->MCH (TDD) for MCCH message %d bytes (mcs %d )\n",
              module_idP,
              frameP,subframeP,
              mcch_sdu_length,
              mcch_mcs);
      } else {
        LOG_I(MAC,"[eNB %d] Frame %d subframeP %d: Scheduling MCCH->MCH (FDD) for MCCH message %d bytes (mcs %d)\n",
              module_idP,
              frameP, subframeP,
              mcch_sdu_length,
              mcch_mcs);
453
      }
454 455 456 457 458 459 460 461 462

      eNB_mac_inst[module_idP].common_channels[CC_id].mcch_active=1;

      memcpy((char *)&mch_buffer[sdu_length_total],
             &eNB_mac_inst[module_idP].common_channels[CC_id].MCCH_pdu.payload[0],
             mcch_sdu_length);
      sdu_lcids[num_sdus] = MCCH_LCHANID;
      sdu_lengths[num_sdus] = mcch_sdu_length;

463
      if (sdu_lengths[num_sdus]>128) {
464
        header_len_mcch = 3;
465
      }
466 467 468 469 470

      sdu_length_total += sdu_lengths[num_sdus];
      LOG_D(MAC,"[eNB %d] Got %d bytes for MCCH from RRC \n",module_idP,sdu_lengths[num_sdus]);
      num_sdus++;
    }
471
  }
472

473
  TBS = mac_xface->get_TBS_DL(eNB_mac_inst[module_idP].common_channels[CC_id].MCH_pdu.mcs, mac_xface->lte_frame_parms->N_RB_DL);
474 475 476 477 478
#ifdef Rel10
  // do not let mcch and mtch multiplexing when relaying is active
  // for sync area 1, so not transmit data
  //if ((i == 0) && ((eNB_mac_inst[module_idP].MBMS_flag != multicast_relay) || (eNB_mac_inst[module_idP].mcch_active==0))) {
#endif
479

480 481
  // there is MTCHs, loop if there are more than 1
  if (mtch_flag == 1) {
482 483 484 485 486 487 488
    // Calculate TBS
    /* if ((msi_flag==1) || (mcch_flag==1)) {
     TBS = mac_xface->get_TBS(mcch_mcs, mac_xface->lte_frame_parms->N_RB_DL);
     }
     else { // only MTCH in this subframeP
     TBS = mac_xface->get_TBS(eNB_mac_inst[module_idP].pmch_Config[0]->dataMCS_r9, mac_xface->lte_frame_parms->N_RB_DL);
     }
489 490 491 492 493

    // get MTCH data from RLC (like for DTCH)
    LOG_D(MAC,"[eNB %d] Frame %d subframe %d: Schedule MTCH (area %d, sfAlloc %d)\n",Mod_id,frame,subframe,i,j);

    header_len_mtch = 3;
494 495 496
    LOG_D(MAC,"[eNB %d], Frame %d, MTCH->MCH, Checking RLC status (rab %d, tbs %d, len %d)\n",
    Mod_id,frame,MTCH,TBS,
    TBS-header_len_mcch-header_len_msi-sdu_length_total-header_len_mtch);
497 498

    rlc_status = mac_rlc_status_ind(Mod_id,frame,1,RLC_MBMS_YES,MTCH+ (maxDRB + 3) * MAX_MOBILES_PER_RG,
499
          TBS-header_len_mcch-header_len_msi-sdu_length_total-header_len_mtch);
500 501
    printf("frame %d, subframe %d,  rlc_status.bytes_in_buffer is %d\n",frame,subframe, rlc_status.bytes_in_buffer);

502
     */
503

504 505
    // get MTCH data from RLC (like for DTCH)
    LOG_D(MAC,"[eNB %d] Frame %d subframeP %d: Schedule MTCH (area %d, sfAlloc %d)\n",module_idP,frameP,subframeP,i,j);
506

507 508
    header_len_mtch = 3;
    LOG_D(MAC,"[eNB %d], Frame %d, MTCH->MCH, Checking RLC status (rab %d, tbs %d, len %d)\n",
509 510 511
          module_idP,frameP,MTCH,TBS,
          TBS-header_len_mcch-header_len_msi-sdu_length_total-header_len_mtch);

512
    rlc_status = mac_rlc_status_ind(module_idP,0,frameP,module_idP,ENB_FLAG_YES,MBMS_FLAG_YES,MTCH,
513 514 515 516 517 518 519 520 521 522 523
                                    TBS-header_len_mcch-header_len_msi-sdu_length_total-header_len_mtch);
    LOG_D(MAC,"e-MBMS log channel %u frameP %d, subframeP %d,  rlc_status.bytes_in_buffer is %d\n",
          MTCH,frameP,subframeP, rlc_status.bytes_in_buffer);

    if (rlc_status.bytes_in_buffer >0) {
      LOG_I(MAC,"[eNB %d][MBMS USER-PLANE], Frame %d, MTCH->MCH, Requesting %d bytes from RLC (header len mtch %d)\n",
            module_idP,frameP,TBS-header_len_mcch-header_len_msi-sdu_length_total-header_len_mtch,header_len_mtch);

      sdu_lengths[num_sdus] = mac_rlc_data_req(
                                module_idP,
                                0,
524
				module_idP,
525 526 527 528 529 530 531 532 533 534
                                frameP,
                                ENB_FLAG_YES,
                                MBMS_FLAG_YES,
                                MTCH,
                                (char*)&mch_buffer[sdu_length_total]);
      //sdu_lengths[num_sdus] = mac_rlc_data_req(module_idP,frameP, MBMS_FLAG_NO,  MTCH+(MAX_NUM_RB*(NUMBER_OF_UE_MAX+1)), (char*)&mch_buffer[sdu_length_total]);
      LOG_I(MAC,"[eNB %d][MBMS USER-PLANE] Got %d bytes for MTCH %d\n",module_idP,sdu_lengths[num_sdus],MTCH);
      eNB_mac_inst[module_idP].common_channels[CC_id].mtch_active=1;
      sdu_lcids[num_sdus] = MTCH;
      sdu_length_total += sdu_lengths[num_sdus];
535

536
      if (sdu_lengths[num_sdus] < 128) {
537
        header_len_mtch = 2;
538
      }
539

540 541 542 543
      num_sdus++;
    } else {
      header_len_mtch = 0;
    }
544
  }
545

546 547 548
#ifdef Rel10
  //  }
#endif
549

550 551
  // FINAL STEP: Prepare and multiplexe MSI, MCCH and MTCHs
  if ((sdu_length_total + header_len_msi + header_len_mcch + header_len_mtch) >0) {
552 553 554 555 556 557 558 559 560 561 562 563
    // Adjust the last subheader
    /*                                 if ((msi_flag==1) || (mcch_flag==1)) {
                                       eNB_mac_inst[module_idP].MCH_pdu.mcs = mcch_mcs;
                                        }
                                      else if (mtch_flag == 1) { // only MTCH in this subframeP
                                     eNB_mac_inst[module_idP].MCH_pdu.mcs = eNB_mac_inst[module_idP].pmch_Config[0]->dataMCS_r9;
                                        }
     */
    header_len_mtch_temp = header_len_mtch;
    header_len_mcch_temp = header_len_mcch;
    header_len_msi_temp = header_len_msi;

564
    if (header_len_mtch>0) {
565
      header_len_mtch=1;         // remove Length field in the  subheader for the last PDU
566
    } else if (header_len_mcch>0) {
567
      header_len_mcch=1;
568 569 570
    } else {
      header_len_msi=1;
    }
571 572 573 574 575

    // Calculate the padding
    if ((TBS - header_len_mtch - header_len_mcch - header_len_msi - sdu_length_total) < 0) {
      LOG_E(MAC,"Error in building MAC PDU, TBS %d < PDU %d \n",
            TBS, header_len_mtch + header_len_mcch + header_len_msi + sdu_length_total);
576
      return 0;
577 578 579 580 581 582
    } else if ((TBS - header_len_mtch - header_len_mcch - header_len_msi - sdu_length_total) <= 2) {
      padding = (TBS - header_len_mtch - header_len_mcch - header_len_msi - sdu_length_total);
      post_padding = 0;
    } else { // using post_padding, give back the Length field of subheader  for the last PDU
      padding = 0;

583
      if (header_len_mtch>0) {
584
        header_len_mtch = header_len_mtch_temp;
585
      } else if (header_len_mcch>0) {
586
        header_len_mcch = header_len_mcch_temp;
587 588 589
      } else {
        header_len_msi = header_len_msi_temp;
      }
590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611

      post_padding = TBS - sdu_length_total - header_len_msi - header_len_mcch - header_len_mtch;
    }

    // Generate the MAC Header for MCH
    // here we use the function for DLSCH because DLSCH & MCH have the same Header structure
    offset = generate_dlsch_header((unsigned char*)eNB_mac_inst[module_idP].common_channels[CC_id].MCH_pdu.payload,
                                   num_sdus,
                                   sdu_lengths,
                                   sdu_lcids,
                                   255,    // no drx
                                   0,  // no timing advance
                                   NULL,  // no contention res id
                                   padding,
                                   post_padding);

    eNB_mac_inst[module_idP].common_channels[CC_id].MCH_pdu.Pdu_size=TBS;
    eNB_mac_inst[module_idP].common_channels[CC_id].MCH_pdu.sync_area=i;
    eNB_mac_inst[module_idP].common_channels[CC_id].MCH_pdu.msi_active= eNB_mac_inst[module_idP].common_channels[CC_id].msi_active;
    eNB_mac_inst[module_idP].common_channels[CC_id].MCH_pdu.mcch_active= eNB_mac_inst[module_idP].common_channels[CC_id].mcch_active;
    eNB_mac_inst[module_idP].common_channels[CC_id].MCH_pdu.mtch_active= eNB_mac_inst[module_idP].common_channels[CC_id].mtch_active;
    LOG_D(MAC," MCS for this sf is %d (mcch active %d, mtch active %d)\n", eNB_mac_inst[module_idP].common_channels[CC_id].MCH_pdu.mcs,
612
          eNB_mac_inst[module_idP].common_channels[CC_id].MCH_pdu.mcch_active,eNB_mac_inst[module_idP].common_channels[CC_id].MCH_pdu.mtch_active );
613 614
    LOG_I(MAC,
          "[eNB %d][MBMS USER-PLANE ] Generate header : sdu_length_total %d, num_sdus %d, sdu_lengths[0] %d, sdu_lcids[0] %d => payload offset %d,padding %d,post_padding %d (mcs %d, TBS %d), header MTCH %d, header MCCH %d, header MSI %d\n",
615 616
          module_idP,sdu_length_total,num_sdus,sdu_lengths[0],sdu_lcids[0],offset,padding,post_padding,eNB_mac_inst[module_idP].common_channels[CC_id].MCH_pdu.mcs,TBS,
          header_len_mtch, header_len_mcch, header_len_msi);
617 618 619 620
    // copy SDU to mch_pdu after the MAC Header
    memcpy(&eNB_mac_inst[module_idP].common_channels[CC_id].MCH_pdu.payload[offset],mch_buffer,sdu_length_total);

    // filling remainder of MCH with random data if necessery
621
    for (j=0; j<(TBS-sdu_length_total-offset); j++) {
622
      eNB_mac_inst[module_idP].common_channels[CC_id].MCH_pdu.payload[offset+sdu_length_total+j] = (char)(taus()&0xff);
623
    }
624

625
    /* Tracing of PDU is done on UE side */
626
    if (opt_enabled ==1 ) {
627
      trace_pdu(1, (uint8_t *)eNB_mac_inst[module_idP].common_channels[CC_id].MCH_pdu.payload,
628 629
                TBS, module_idP, 6, 0xffff,  // M_RNTI = 6 in wirehsark
                eNB_mac_inst[module_idP].subframe,0,0);
630
      LOG_D(OPT,"[eNB %d][MCH] Frame %d : MAC PDU with size %d\n",
631
            module_idP, frameP, TBS);
632
    }
633

634 635 636 637 638 639 640 641 642 643 644 645 646 647 648
    /*
    for (j=0;j<sdu_length_total;j++)
    printf("%2x.",eNB_mac_inst[module_idP].MCH_pdu.payload[j+offset]);
    printf(" \n");*/
    return 1;
  } else {
    eNB_mac_inst[module_idP].common_channels[CC_id].MCH_pdu.Pdu_size=0;
    eNB_mac_inst[module_idP].common_channels[CC_id].MCH_pdu.sync_area=0;
    eNB_mac_inst[module_idP].common_channels[CC_id].MCH_pdu.msi_active=0;
    eNB_mac_inst[module_idP].common_channels[CC_id].MCH_pdu.mcch_active=0;
    eNB_mac_inst[module_idP].common_channels[CC_id].MCH_pdu.mtch_active=0;
    // for testing purpose, fill with random data
    //for (j=0;j<(TBS-sdu_length_total-offset);j++)
    //  eNB_mac_inst[module_idP].MCH_pdu.payload[offset+sdu_length_total+j] = (char)(taus()&0xff);
    return 0;
649
  }
650

651 652 653 654 655 656 657 658 659 660
  //this is for testing
  /*
  if (mtch_flag == 1) {
  //  LOG_D(MAC,"DUY: mch_buffer length so far is : %ld\n", &mch_buffer[sdu_length_total]-&mch_buffer[0]);
  return 1;
  }
  else
  return 0;
   */
}
661 662

MCH_PDU *get_mch_sdu(module_id_t module_idP, int CC_id, frame_t frameP, sub_frame_t subframeP)
663
{
664 665
  //  eNB_mac_inst[module_idP].MCH_pdu.mcs=0;
  //LOG_D(MAC," MCH_pdu.mcs is %d\n", eNB_mac_inst[module_idP].MCH_pdu.mcs);
666 667
#warning "MCH pdu should take the CC_id index"
  return(&eNB_mac_inst[module_idP].common_channels[CC_id].MCH_pdu);
668 669 670
}

#endif